.container{
    width: 1200px;
    margin: 50px auto;
    border: 1px solid #6bde89;
    background: linear-gradient(50deg, #46abd1, #fff, #00c56a);
    .course-tab{
        width: 100%;
        border-bottom: 1px solid #74d3f6;
        ul{
            display: flex;
            list-style: none;
            align-items: center;
            .course-item-lk{
                font-size: 20px;
                letter-spacing:3px;
                font-weight: 700;
                color: #fc2121;
                text-shadow: 1px 2px 4px #0328ae;
                &.lk-current{
                    color: #07d982;
                }
            }
        }
    }
    .list-wrapper{
        display: flex;
        flex-wrap: wrap;
    }
}